/Engine/Source/Editor/MovieSceneTools/Public/TrackEditors/SubTrackEditor.h
Callback for generating the menu of the "Add Sequence" combo button.
[TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > HandleAddSubSequenceComboButtonGetMenuContent ( [UMovieSceneTrack](API\Runtime\MovieScene\UMovieSceneTrack) * InTrack )